DETROIT -- Brett Favre's season and, perhaps, his 20-year NFL career are over.

The Minnesota Vikings deactivated their 41-year-old quarterback for Sunday's season finale against the Detroit Lions because of lingering effects from the concussion Favre suffered last month.

Favre reportedly passed a neurological examination late last week -- the same test he'd failed several times previously -- but also would have had to pass a conditioning test without symptoms and be cleared by an independent neurologist, per NFL concussion protocol.

Favre missed Tuesday's loss to Philadelphia because of the concussion, in addition to sitting out the Vikings' Dec. 13 loss here to the New York Giants because of issues with his throwing arm before making a surprise start the following week against the Bears. That means football's legendary ironman missed more than 3½ of the last four games in what he has said repeatedly is his final season.

If Favre does retire, the final play of a legendary career that saw him eclipse every major passing record was the hit by Bears end Corey Wootton that knocked Favre unconscious in the second quarter on Dec. 20 at TCF Bank Stadium.

Receiver Bernard Berrian, added to the injury report on Saturday, appeared uncomfortable as he tested his quadriceps injury about two hours before kickoff. But he apparently did enough to convince coaches and trainers he was in good enough shape to start.